78.57% is the change from 504 to 900
Calculation steps:
[( 900 - 504 ) ÷ 504] x 100 = 78.57%
Formula
Percentage change = [(900 - 504) / 504] x 100
Subtract the new number by the original number
900 - 504 = 396
396 ÷ 504 = 0.7857142857142857
0.7857142857142857 x 100 = 78.57%